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16f859dafd
This makes life easier when calling e.g. `saul_reg_write()` with data stored in flash. As now the signatures for reading and writing differ (in that `const` qualifier only), `saul_notsup()` is split into `saul_write_notsup()` and `saul_read_notsup()`. However, one is implemented as a symbol alias of the other, so that ROM consumption remains unchanged.
43 lines
929 B
C
43 lines
929 B
C
/*
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* Copyright (C) 2016 Eistec AB
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup drivers_saul
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* @{
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*
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* @file
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* @brief SAUL wrapper for direct access to analog pins
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*
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* @author Joakim Nohlgård <joakim.nohlgard@eistec.se>
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*
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* @}
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*/
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#include <string.h>
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#include "saul.h"
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#include "saul/periph.h"
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#include "phydat.h"
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#include "periph/adc.h"
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static int read_adc(const void *dev, phydat_t *res)
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{
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const saul_adc_params_t *params = *((const saul_adc_params_t **)dev);
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res->val[0] = adc_sample(params->line, params->res);
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/* Raw ADC reading has no unit */
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res->unit = UNIT_NONE;
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res->scale = 0;
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return 1;
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}
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const saul_driver_t adc_saul_driver = {
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.read = read_adc,
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.write = saul_write_notsup,
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.type = SAUL_SENSE_ANALOG,
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};
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